Definition of oof
—used to express discomfort, surprise, or dismayI once watched a highlight reel of Tyson knockouts with a roomful of intoxicated medical students who punctuated every blow with phrases like "Oof! I can't believe that dude's sternum didn't just collapse."— Diane Vadino
Keep scrolling for more
Test Your Vocabulary
Slippery Words Quiz—Changing with the Times
- What is an earlier meaning of nice?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Slippery Words Quiz—Changing with the Times
Do you know these earlier meanings of words?
Take the quizWords of Snow and Ice Quiz
A selection of words from the chillier parts of t...
Take the quizName That Thing
Test your visual vocabulary with our 10-question ...
Take the quizWord Winder's CrossWinder Play the game
Share oof
Time Traveler for oof
The first known use of oof was in 1777
See more words from the same year